Bipolar plate and flow guide frame assembly of liquid flow battery

Abstract

The present invention belongs to the technical field of liquid flow batteries, and specifically relates to a bipolar plate and a guide frame assembly of a liquid flow battery, which comprises a bipolar plate body, two guide frames, two positive electrode drainage blocks, two negative electrode drainage blocks, a partition, a cover plate, two flow control chambers, two liquid storage tanks and two liquid delivery pumps. Two battery slots are provided in the middle of the bipolar plate body, the partition is fixedly installed on the inner wall of the battery slot and separates the two battery slots, the two positive electrode drainage blocks are respectively fixedly installed on the left sides of the two battery slots, and the two negative electrode drainage blocks are respectively fixedly installed on the right sides of the two battery slots; both left and right sides of the bipolar plate body are provided with placement grooves, and the two guide frames are respectively placed in the two placement grooves, and the two flow control chambers are respectively fixedly installed above the two guide frames. The device solves the problem that the electrolyte of the current liquid flow battery cannot accurately control the flow rate and the battery cannot be efficiently cooled.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid flow batteries, and in particular relates to a bipolar plate and a flow guide frame assembly of a liquid flow battery. Background Art

[0002] The flow battery consists of a stack unit, an electrolyte, an electrolyte storage and supply unit, and a management and control unit. It is a high-performance battery that separates the positive and negative electrolytes and circulates them separately. It has the characteristics of high capacity, wide application range (environment), and long cycle life. It is a new energy product.

[0003] The electrolyte flow rate directly affects the temperature of the battery by affecting the removal of heat and the control of local concentration during the electrolysis process. Appropriate flow rate can effectively control and regulate the battery temperature and maintain the stability and safety of the battery operation process. This phenomenon has become a problem that needs to be solved urgently by people in this field. Summary of the invention

[0004] The object of the present invention is to provide a bipolar plate and flow guide frame assembly for a liquid flow battery to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a bipolar plate and flow guide frame assembly of a flow battery, comprising a bipolar plate body, two flow guide frames, two positive electrode drainage blocks, two negative electrode drainage blocks, a partition, a cover plate, two flow control chambers, two liquid storage tanks and two liquid delivery pumps, wherein two battery slots are provided in the middle of the bipolar plate body, the partition is fixedly installed on the inner wall of the battery slot and separates the two battery slots, the two positive electrode drainage blocks are respectively fixedly installed on the left side of the two battery slots, and the two negative electrode drainage blocks are respectively fixedly installed on the left side of the two battery slots. Installed on the right side of the two battery slots; both left and right sides of the bipolar plate body are provided with placement grooves, and the two guide frames are respectively placed in the two placement grooves, the two flow control chambers are respectively fixedly installed on the top of the two guide frames, and the left and right sides of the cover plate are provided with slots, the two flow control chambers are respectively inserted into the two slots, and the cover plate is fixed to the bipolar plate body with screws; the two liquid storage tanks are provided with electrolyte, the liquid delivery pump connects the liquid storage tank and the guide frame through a pipeline, and the two guide frames are provided with guide grooves inside.

[0006] The present invention further illustrates that the internal axis of the guide groove is connected to a shaft rod, a flow plate is fixedly installed on the outer side of the shaft rod, and the flow plate is located inside the guide groove; a gear is fixedly installed on the upper end of the shaft rod, and the gear is located inside the flow control chamber, the flow control chamber includes a motor and a gear plate, the motor is fixedly installed above the inner wall of the flow control chamber, the gear plate is fixedly connected to the output end of the motor, and meshes with the gear.

[0007] The present invention further illustrates that the flow control chamber also includes a hydraulic chamber and a cylinder; the inner wall of the hydraulic chamber is slidably connected with a hydraulic plate, the hydraulic plate is fixedly connected to the output end of the cylinder, the cylinder is fixedly installed above the inner wall of the flow control chamber, and a cooling groove is provided on one side of the two battery slots, and the cooling groove is connected to the rear side pipeline of the hydraulic chamber; the rear side of the hydraulic plate is filled with coolant.

[0008] The present invention further describes that the flow control chamber also includes an electric motor and a stirring blade, and the stirring blade is fixedly connected to the output end of the electric motor and is located inside the hydraulic chamber.

[0009] The present invention further describes that a temperature sensor is provided at the bottom of the battery slot, a temperature sensing module is provided inside the temperature sensor, the temperature sensing module is used to sense the temperature of the battery, control modules are provided inside the motor, cylinder and electric motor, the three control modules are electrically connected to the temperature sensing module, and the control module in the motor is used to control the rotation angle of the motor according to the temperature of the battery.

[0010] The present invention further illustrates that the control module in the cylinder is used to control the reciprocating frequency in the cylinder according to the temperature of the battery.

[0011] The present invention further illustrates that the control module is used to control the speed of the electric motor according to the temperature of the battery.

[0012] The present invention further illustrates that a guide rail is fixedly installed on the left side of the hydraulic chamber, and a tooth plate is slidably connected inside the guide rail, and the tooth plate and the toothed disc are meshed with each other; a connecting rod is fixedly connected to the bottom of the tooth plate and the left side of the electric motor, and bearing seats are installed on the upper end of the stirring blade and the bottom of the hydraulic plate, and a spring is installed on the bearing between the two bearing seats.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention adopts a method of controlling the flow rate of electrolyte. When the battery temperature rises, the motor runs, driving the toothed disc to rotate, the toothed disc drives the gear to rotate through meshing, and the gear drives the flow plate to rotate through the shaft. After the flow plate rotates, the flow rate of electrolyte in the guide groove changes, thereby controlling the flow rate of electrolyte, controlling the operating temperature of the battery, avoiding damage to the battery due to excessive temperature, and protecting the battery;

[0014] While the electrolyte flow is controlled, the coolant enters the cooling tank to efficiently cool the battery, further protecting the battery and reducing the battery temperature. While the coolant enters and exits the cooling tank, the electric motor runs to drive the stirring blades to rotate at high speed. When the stirring blades rotate, the coolant is stirred at high speed, thereby accelerating the cooling speed of the coolant to avoid the coolant not being cooled in time and thus reducing the cooling effect after entering the cooling tank, further improving the cooling efficiency. During the rotation of the toothed disc, the toothed plate is driven to move, so that the toothed plate slides along the inner wall of the guide rail, and the toothed plate drives the electric motor to move through the connecting rod. The electric motor lifts the spring through the stirring blade, so that during the sliding process of the hydraulic plate, the reaction force of the spring is stronger and plays a certain limiting role. When the cylinder reciprocates, the efficiency of the coolant entering and exiting is further increased, thereby further improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a schematic structural diagram of a bipolar plate of the present invention;

[0018] Figure 3 It is a schematic diagram of the installation position of the flow plate of the present invention;

[0019] Figure 4 is a top view of the flow control chamber of the present invention;

[0020] Figure 5 It is a schematic diagram of the internal structure of the flow control chamber of the present invention;

[0021] Figure 6 It is a schematic diagram of the meshing state of the toothed disc and the toothed plate of the present invention;

[0022] Figure 7 It is a schematic diagram of the internal structure of the hydraulic chamber of the present invention;

[0023] In the figure: 1. bipolar plate body; 2. guide frame; 21. guide groove; 211. shaft; 212. flow plate; 213. gear; 3. battery slot; 31. cooling slot; 4. positive electrode drainage block; 5. negative electrode drainage block; 6. partition; 7. cover plate; 8. flow control chamber; 81. motor; 82. gear plate; 83. hydraulic chamber; 831. hydraulic plate; 84. cylinder; 85. electric motor; 86. stirring blade; 87. guide rail; 871. gear plate; 872. connecting rod; 88. spring. DETAILED DESCRIPTION

[0024] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-7 The present invention provides a technical solution: a bipolar plate and flow guide frame assembly of a flow battery, comprising a bipolar plate body 1, two flow guide frames 2, two positive electrode drainage blocks 4, two negative electrode drainage blocks 5, a partition 6, a cover plate 7, two flow control chambers 8, two liquid storage tanks and two liquid delivery pumps, two battery slots 3 are provided in the middle of the bipolar plate body 1, the partition 6 is fixedly mounted on the inner wall of the battery slot 3 and separates the two battery slots 3, the two positive electrode drainage blocks 4 are respectively fixedly mounted on the left sides of the two battery slots 3, and the two negative electrode drainage blocks 5 are respectively fixedly mounted on the right sides of the two battery slots 3;

[0026] The left and right sides of the bipolar plate body 1 are provided with placement grooves, and the two flow guide frames 2 are respectively placed in the two placement grooves, and the two flow control chambers 8 are respectively fixedly installed above the two flow guide frames 2, and the left and right sides of the cover plate 7 are provided with slots, and the two flow control chambers 8 are respectively inserted into the two slots, and the cover plate 7 is fixed to the bipolar plate body 1 with screws;

[0027] Electrolyte is provided inside the two liquid storage tanks, and the liquid delivery pump is connected to the liquid storage tank and the flow guide frame 2 through a pipeline, and the two flow guide frames 2 are provided with flow guide grooves 21 inside;

[0028] The liquid delivery pump injects the electrolyte in the liquid storage tank into the guide frame 2 through the pipeline. The electrolyte enters the positive electrode drainage block 4 and the negative electrode drainage block 5 through the guide groove 21 respectively, and finally enters the battery. The electrolyte circulates through the battery to carry out chemical reactions. The electrolyte after the reaction returns to the liquid storage tank, and the active material circulates continuously to complete the charging and discharging process. During the charging and discharging process, the battery generates heat. The flow rate of the electrolyte is controlled by the flow control chamber 8, thereby controlling the heat of the battery, avoiding battery damage, and protecting the battery.

[0029] The inner axis of the guide groove 21 is connected with a shaft rod 211, and a flow plate 212 is fixedly installed on the outer side of the shaft rod 211, and the flow plate 212 is located inside the guide groove 21;

[0030] A gear 213 is fixedly mounted on the upper end of the shaft 211, and the gear 213 is located inside the flow control chamber 8. The flow control chamber 8 includes a motor 81 and a toothed disc 82. The motor 81 is fixedly mounted above the inner wall of the flow control chamber 8. The toothed disc 82 is fixedly connected to the output end of the motor 81 and meshes with the gear 213.

[0031] When the battery temperature rises, the motor 81 runs, driving the toothed disc 82 to rotate. The toothed disc 82 drives the gear 213 to rotate through meshing. The gear 213 drives the flow plate 212 to rotate through the shaft 211. After the flow plate 212 rotates, the electrolyte flow in the guide groove 21 changes, thereby controlling the electrolyte flow, controlling the battery operating temperature, avoiding damage to the battery due to excessive temperature, and protecting the battery.

[0032] The flow control chamber 8 also includes a hydraulic chamber 83 and a cylinder 84;

[0033] The inner wall of the hydraulic chamber 83 is slidably connected with a hydraulic plate 831, which is fixedly connected to the output end of the cylinder 84. The cylinder 84 is fixedly installed above the inner wall of the flow control chamber 8. A cooling groove 31 is provided on one side of the two battery slots 3, and the cooling groove 31 is connected to the rear side pipeline of the hydraulic chamber 83;

[0034] The rear side of the hydraulic plate 831 is filled with coolant;

[0035] While the electrolyte flow is controlled, the cylinder 84 runs, driving the hydraulic plate 831 to slide along the inner wall of the hydraulic chamber 83. The coolant on the rear side of the hydraulic plate 831 is squeezed and enters the cooling groove 31 through the pipeline, so as to quickly cool the battery slot 3. Then the cylinder 84 is reset, thereby driving the hydraulic plate 831 to reset. After resetting, the coolant in the cooling groove 31 is extracted, so as to efficiently cool the battery, further protect the battery and reduce the temperature of the battery.

[0036] The flow control chamber 8 also includes an electric motor 85 and a stirring blade 86. The stirring blade 86 is fixedly connected to the output end of the electric motor 85 and is located inside the hydraulic chamber 83.

[0037] While the coolant enters and exits the cooling tank 31, the electric motor 85 runs, driving the stirring blade 86 to rotate at high speed. When the stirring blade 86 rotates, the coolant is stirred at high speed, thereby accelerating the cooling speed of the coolant, avoiding the coolant not being able to be cooled in time and thus reducing the cooling effect after entering the cooling tank 31, thereby further improving the cooling efficiency.

[0038] A temperature sensor is provided at the bottom of the battery slot 3, and a temperature sensing module is provided inside the temperature sensor. The temperature sensing module is used to sense the temperature of the battery. A control module is provided inside the motor 81, the cylinder 84 and the electric motor 85. The three control modules are electrically connected to the temperature sensing module. The control module in the motor 81 is used to control the rotation angle of the motor 81 according to the temperature of the battery.

[0039] The higher the battery temperature, the smaller the rotation angle of the motor 81, so that the flow rate is smaller, which has the effect of lowering the battery temperature. The lower the battery temperature, the larger the rotation angle of the motor 81, so that the flow rate is larger, ensuring the flow stability of the electrolyte, intelligently controlling the flow rate, and achieving higher battery operation performance and longer service life. The overall structure has low cost and is suitable for mass production.

[0040] The control module in the cylinder 84 is used to control the reciprocating frequency in the cylinder 84 according to the temperature of the battery.

[0041] The control module is used to control the speed of the electric motor 85 according to the temperature of the battery;

[0042] The higher the battery temperature, the higher the reciprocating frequency of the cylinder 84, and the faster the rotation speed of the electric motor 85, the faster the cooling effect of the coolant and the frequency of entering and exiting the cooling tank 31, which can cool the battery to the greatest extent and provide efficient protection for the battery. When the battery temperature is low, the reciprocating frequency of the cylinder 84 and the rotation speed of the electric motor 85 are reduced, which can not only ensure the normal operation of the cooling, but also relatively reduce energy consumption and save costs.

[0043] A guide rail 87 is fixedly installed on the left side of the hydraulic chamber 83, and a tooth plate 871 is slidably connected inside the guide rail 87, and the tooth plate 871 is meshed with the toothed disc 82;

[0044] The bottom of the tooth plate 871 is fixedly connected to the left side of the electric motor 85 with a connecting rod 872. The upper end of the stirring blade 86 and the bottom of the hydraulic plate 831 are both equipped with bearing seats. A spring 88 is installed between the two bearing seats.

[0045] During the rotation of the toothed disc 82, the toothed plate 871 is driven to move, so that the toothed plate 871 slides along the inner wall of the guide rail 87. The toothed plate 871 drives the electric motor 85 to move through the connecting rod 872. The electric motor 85 lifts the spring 88 through the stirring blade 86, so that when the hydraulic plate 831 slides, the reaction force of the spring 88 is stronger and plays a certain limiting role. When the cylinder 84 reciprocates, the efficiency of the coolant entering and exiting is further increased, thereby further improving the cooling efficiency.

[0046] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0047] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bipolar plate and flow guide frame assembly of a liquid flow battery, comprising a bipolar plate body (1), two flow guide frames (2), two positive electrode flow guide blocks (4), two negative electrode flow guide blocks (5), a separator (6), a cover plate (7), two flow control chambers (8), two liquid storage tanks and two liquid delivery pumps, characterized in that: Two battery slots (3) are provided in the middle of the bipolar plate body (1); the partition plate (6) is fixedly mounted on the inner wall of the battery slot (3) and separates the two battery slots (3); the two positive electrode drainage blocks (4) are respectively fixedly mounted on the left sides of the two battery slots (3); and the two negative electrode drainage blocks (5) are respectively fixedly mounted on the right sides of the two battery slots (3); The left and right sides of the bipolar plate body (1) are provided with placement grooves, and the two flow guide frames (2) are respectively placed in the two placement grooves, the two flow control chambers (8) are respectively fixedly installed above the two flow guide frames (2), the left and right sides of the cover plate (7) are provided with slots, the two flow control chambers (8) are respectively inserted into the two slots, and the cover plate (7) is fixed to the bipolar plate body (1) with screws; Electrolyte is provided inside the two liquid storage tanks, the liquid delivery pump is connected to the liquid storage tank and the flow guide frame (2) via a pipeline, a flow guide groove (21) is provided inside the two flow guide frames (2), the internal axis of the flow guide groove (21) is connected to a shaft (211), a flow plate (212) is fixedly installed on the outside of the shaft (211), and the flow plate (212) is located inside the flow guide groove (21); A gear (213) is fixedly mounted on the upper end of the shaft (211), and the gear (213) is located inside the flow control chamber (8). The flow control chamber (8) comprises a motor (81) and a toothed disc (82). The motor (81) is fixedly mounted above the inner wall of the flow control chamber (8). The toothed disc (82) is fixedly connected to the output end of the motor (81) and meshes with the gear (213). A temperature sensor is arranged at the bottom of the battery slot (3). A temperature sensing module is arranged inside the temperature sensor. The temperature sensing module is used to sense the temperature of the battery. A control module is arranged inside the motor (81) and is electrically connected to the temperature sensing module. The control module in the motor (81) is used to control the rotation angle of the motor (81) according to the temperature of the battery.

2. The bipolar plate and flow guide frame assembly of a liquid flow battery according to claim 1, characterized in that: The flow control chamber (8) further comprises a hydraulic chamber (83) and a cylinder (84); The inner wall of the hydraulic chamber (83) is slidably connected to a hydraulic plate (831), the hydraulic plate (831) is fixedly connected to the output end of the cylinder (84), the cylinder (84) is fixedly installed above the inner wall of the flow control chamber (8), and a cooling groove (31) is provided on one side of the two battery slots (3), and the cooling groove (31) is connected to the rear side pipeline of the hydraulic chamber (83); The rear side of the hydraulic plate (831) is filled with coolant.

3. The bipolar plate and flow guide frame assembly of a liquid flow battery according to claim 2, characterized in that: The flow control chamber (8) further comprises an electric motor (85) and a stirring blade (86); the stirring blade (86) is fixedly connected to the output end of the electric motor (85) and is located inside the hydraulic chamber (83).

4. The bipolar plate and flow guide frame assembly of a flow battery according to claim 3, characterized in that: The cylinder (84) and the electric motor (85) are also provided with control modules inside, and are both electrically connected to the temperature sensing module.

5. The bipolar plate and flow guide frame assembly of a flow battery according to claim 4, characterized in that: The control module in the cylinder (84) is used to control the reciprocating frequency in the cylinder (84) according to the temperature of the battery.

6. The bipolar plate and flow guide frame assembly of a liquid flow battery according to claim 5, characterized in that: The control module is used to control the rotation speed of the electric motor (85) according to the temperature of the battery.

7. The bipolar plate and flow guide frame assembly of a liquid flow battery according to claim 6, characterized in that: A guide rail (87) is fixedly installed on the left side of the hydraulic chamber (83), a toothed plate (871) is slidably connected inside the guide rail (87), and the toothed plate (871) is meshed with the toothed disc (82); A connecting rod (872) is fixedly connected between the bottom of the tooth plate (871) and the left side of the electric motor (85), and a bearing seat is installed at the upper end of the stirring blade (86) and the bottom of the hydraulic plate (831), and a spring (88) is installed on the bearing between the two bearing seats.

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